Arc generator



Aug. 31 1926.

G. H. CLARK ARC GENERATOR Filed July 1. 1922 Emma wot GEORGE H. CLARK 3515 his flbfovnmg%% Z l Patented Aug. 31, 1926.

METRE) ra'rsur OFFICE.

GEORGE E. CLARK, or BROOKLYN, new roan, ASSIGNOR ro :anngro conronnrr on OF AMERICA, A COREORA'IION or DELAWARE.

ARC GENERATOR.

Application filed July 1,

The present invention relates to improvements in arc lamps in which the arc chamber is supplied with vapors during operation, and particularly to are lamps in which the vapor is supplied by volatilization of a liquid such as alcohol for maintaining a hydrocarbon vapor in the arc chamber.

The more simple method is to pass the liquid through a valve from the supply chamber by regulating the valve to cause it to drop by gravity atthe proper rate to maintain the desired atmospheric conditions in the arc chamber.

With the gravity drip feed I have found that when the arc is started the feeding is satisfactory but after sufficient liquid is volatilized the drip of alcohol is interfered with, apparently by the back pressure of the vapors in the chamber which does not permit the supply to pass through the smah opening with the desired and necessary regularity.

The object of the invention is to cure this serious defect.

In accordance with the invention the re sult is achieved by connecting the liquid supply reservoir with the arc chamber by means of a tube.

The single figure of the drawing is a more or less diagrammatic representation of an arc generator in cross section embodying the invention.

In the drawing 1 is the arc chamber which may be of bronze. The electrodes 2 and 3 which are preferably of carbon and copper are fastened in holders 4: and 5 which are adjustable by means of feed screws 6 and 7 to start the arc and to maintain the proper spacing during operation. In the drawing the electrodes are manually adjusted although any suitable automatic striking and regulating means may be utilized. The gravity feed comprises a vessel 8 containing alcohol for example, connected by a tube 9 with the arc'chamber. Any suitable valve arrangement such as an adjustableset screw 10 may be used for varying the size of the opening in the tube leading to the chamber. A sight feed 11 for observing the flow of liquid is also preferably provided. To prevent the flow from becoming unregular or being stopped during operation the arc chamber is connected with a vessel containingthe volatile liquid by means of a tube 12 which is connected to the top of the vessel and 1922. Serial No. 572,354.

maintains the pressure on the upper surface of the liquid the same as the pressure in the arc chamber. By this means I have found that a steady drip can be maintained through the small valve opening at all times. The are generator will be connected with a source of power 12 and blow-out magnet 13 in a well known manner. The electrodes may be connected to the antenna 14 and to ground and may be shunted by an absorption circuit inductance 15, capacity 16 and resistance 17, the latter being short-circuited by key 18 for producing signals.

Having described my invention, what I claim is:

1. In combination with an are having an enclosing chamber, a vessel containing a supply of volatile liquid connected with the chamber through a tube for maintaining a drip gravityfeed and means for maintaining the same pressure in the vessel and in the chamber.

2. In combination with an are having an enclosing chamber, .a vessel containing a supply of volatile liquid connected with the chamber through a tube for maintaining a drip gravity feed and means for maintaining the same pressure in the vessel and in the chamber comprising a tube connecting the interior of the chamber with the interior of the vessel.

8. In combination an are for generating oscillation, a chamber enclosing the arc, a vessel containing a supply of volatile liquid connected with the chamber through a tube for maintaining a drip gravity feed and means for maintaining the same pressure in the vessel as exists in the chamber at all times. v

4. In combination with an are for generating oscillations, a chamber enclosing the are, a vessel containing a supply of alcohol connected with the chamber through a tube for maintaining a drip gravity feed and means for maintaining the same pressure in the vessel as exists in the chamber at all times.

5. In combination with an arc for generating oscillations, a chamber enclosing the arc, a vessel containing a supply of volatile liquid connected with the chamber through a tube for maintaining a drip gravity feed and means for preventing dis- 'turbance in the feed of liquid to said chamber by pressure within the chamber comprising a tube connecting the interior of the chamber with the interior of the vessel.

6. In combination with an are for generating oscillations, a chamber enclosing the 5 arc, a vessel containing a supply of volatile liquid connected With the chamber through a tube for maintaining a drip gravity feed and means for preventing disturbance in the feed of liquid to said chamber caused by changes in pressure Within said 10 chamber comprising a conduit connectedito said chamber for applying pressure behind said liquid.

GEORGE H. CLARK. 

